Background: Cross-sectional analysis was performed to study the trend
in weight lass following surgery. Methods: Among 194 patients involved
in the study during the period 1990-1995, 86.6% were female and 87.1%
were white. Median Values for the initial cohort of 194 patients were
as follows: age 32.5 years; height 163,8cm; preoperative weight 122.8
1 kg. Of these patients 67%, 30%, and 3% of the patients were categori
zed as morbidly obese, super obese, and obese respectively. They ail u
nderwent gastric bypass surgery. Results: Follow-up rates were 67.9% a
t 1 year, 55.8% at 2 years, 62.8% al 3 years, and 70.0% at 4 years pos
toperation. Median BMI was reduced from 45.18 to 28.40, and median per
centage loss of excess weight was 68.5% after 1 year, After 2, 3, and
4 years, median BMI values were 27.69, 28.63, and 29.40, and median pe
rcentages of excess weight loss were 71.18%, 69.28%, and 57.49%, respe
ctively. Although the analysis at 4 years indicates that some patients
experience slight weight gain, the increase was neat significant and
further analysis will be performed when more data points are available
. Conclusion: postoperative weight loss has been satisfactory.